561450461220 has 72 divisors (see below), whose sum is σ = 1857890623680. Its totient is φ = 136109202240.

The previous prime is 561450461137. The next prime is 561450461227. The reversal of 561450461220 is 22164054165.

561450461220 is a `hidden beast` number, since 5 + 6 + 14 + 5 + 0 + 4 + 612 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (561450461227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141778440 + ... + 141782399.

It is an arithmetic number, because the mean of its divisors is an integer number (25804036440).

Almost surely, 2^561450461220 is an apocalyptic number.

It is an amenable number.

561450461220 is an abundant number, since it is smaller than the sum of its proper divisors (1296440162460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561450461220 is a wasteful number, since it uses less digits than its factorization.

561450461220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283560865 (or 283560860 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 561450461220 in words is "five hundred sixty-one billion, four hundred fifty million, four hundred sixty-one thousand, two hundred twenty".